Push-button switch.



A. W. GRAY. PUSH BUTTON SWITCH.

APPMCATION FILED Ammo, 1912.

1,126,985. Patented Feb.2, 1915.

2 SHEETS-SHEET 1.

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AA, W. GRAY.

PUSH -BUTTON SWITCH.

APPLICATION FILED APR.20,1912.

Patented Feb. 2, 1915.

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BOWN, F PITTSBURGH, PENNSYLVANIA.

PUSH-BUTTN SWITCH.

Specication of Letters Patent.

Patented lfec.. .23,

application filed april so, i912. semi iro. 692,079.

To all whom it may concern.'

Be it known that l, DELBERT W. GRAY, a resident of Pittsburgh, Northside in the county of Allegheny and State of iDennsylvania, have invented a new and useful linu provement in Push-Button Switches; and I do hereby declare the following to be a full, clear, and exact description thereof.

My Ainvention relates to push button switches, and has special reference to what is known as a single push button switch.

The object of my invention is to provide a cheap, sim eand etlicient single push button switch, which will enable the switches to be easily and quickly thrown, as 'well as one 'which will be strong and durable and will. be accurate and positive in its movements of operation.

My invention consists, generally stated, in the novel arrangement, construction and combination or" parts, as hereinafter more specifically set forth and described and particularly pointed out in the claims.

To enable others skilled in the art to which my invention appeitains to construct and use my improved push button switch, I will describe the saine more fully, referring to the accompanying drawings, in which- Figure l is a side view of iny improved push button switch in the contacting position and lshowing the box or casing in' section. Fig. 2 is an end view of the saine, with the box in section. Fig. 3 is a front view showing the box and frame in cross-section.

Fig. 4 is a side view partly in section of the switch showing an intermediate position of the same. Fig. 5 is a like view showing another position of the saine when the contact is broken. Fig. 6 is an inverted sectional View of the button showing the device for rotating the butt-on. Fig. 7 is a like view Ashowing another position oit the same. Figs. S and 9 are face views of the button employed and showing the same in ditt'ei'ent positions.

Like symbols of reference herein indicate like parts in each of the figures of the drawings.

As illustrated in the drawings, l repre sents the switch box or receptacle, which is formed of any suitable material, and 2 is the rocking shaft located iii said receptacle of the receptacle .l by means of the screws i 5 passing through enlargements 5 on the ends of said receptacle and engaging with said frame, while the usual 'face-plate d is fixed to the tront of said receptacle and. over said trame I in the usual manner 'by screws 4 for bearing against the face of the wall or other place in which the switch is placed 'for use. Extending around the shaft 2 and centrally of the receptacle l. is the guide-sash 6, which preierably stamped .trom sheet metal, and has the push button T rotatably mounted thereon by a pin 8 on the front end oit said sash tittinf loosely within a seat .tor the saine vin button. rThis button 7 extends ieesel/ through an opening l0 in the i'ranie an through a like opening in the faceplate and acts as the outer end guide fer the fr end thrust of the sash (i. A rirn is 'terme I on the inner end of said button to tit withi'.. a seat 9 in the back of the trains 4: te het said button in position. The angular end, 1l on a bracket ll carried by the rear of the bracket 3 forming part oit the frame are suitably slotted to guide the inner er rear ends of the sash 6.

'A pin l2 is rigidly fixed to and projects from each side of the sash 6, which pin is l 3 Il: tu .Quid Flu.

' carried with the end travel of said sash, and

has one of its projecting ends flattened on its two sides, as at 13, tc act a rfinger, as hereinafter' described, while vthe other projecting- .end is made smaller and of round forni, as at lf3 te urevide tulcrum for the two-claw gripping device andv upon such fulcruni the device is niovably secured by a spring-washer er 14', but in such manier as will enable saiddevice to rook with limited friction. @ne of the extended ends lf of the spiral spring l5 is securely fixed to the bracket 1l of the frame et, asby the screw i6, and its other extended end l5 is curved, as 17, in order to adapt .its pressure against the pin 12 in such a manner as to flexibly hold the sashV 6 normally outward. A crossarm 18, preferably formed of stairiued metal is rigidly mounted on the shaft 2, and a CIB as to rock therewith, while the spring 25 is 4115 similarly attached to the cross-arm 18, as at that both will tend to move in unison when the said shaft rocks in either direcl tion. The other or free ends 24 and 25 of the springs 24 and 25 are bent outward from the shaft 2, so that they will be oppo- 'site to each other in'a parallel line and to said shaft. These projecting ends 24" and 25 of the springs 24 and 25'protrude oppo- 25 sitely to each other through the central open space of the grippingy device 14, and one of said ends will always rest immediately behind and directly in the rearward path of either ofthe claws 26 and 27 .on the device 30 14and depending upon the direction of tilt of said device. A rounded shifting pin or lug 28 is rigidly carried by the tumbler 21 and normally assumes the positions indicated in |Figs. 1 and, and said pinalways protrudes through the central opening in 25', and movable therewith, so these springs the device 20, as indicated in Figs. 1 to 5 inv elusive.

Assuming that the switch is l normally closed, as shown in Figs. 1 to 3 inclusive, the switching operation will ensue by pressing the button 7 to slide the guide-sash 6 inward which will carry the claw 27 of the gripping device 14 into engagement with the projecting free end 24" on the spring 24, andthereby carry said spring end inward to a distance slightly greater than that represented by one-fourth of the circumference of shaft 2, so that said free end is disposed in respect to said shaft, as shown in Fig. 4, and will thus create a torsion of said spring, which is .exerted upon said shaft and tends to draw the switch-blades 19 and 22 from their closed positionsas indicated in Figs. 1 toB, and throw them. into their open positions. as shown in Figs. 4 and 5. This action will not occur until the triggerfinger 12 has traveled inward with the guide-sash G to slide said linger out of the locking 'slot 519 toI the position'v shown in Fig. 4, while the shorter segment 30 of the tumbler 21 will escape from engagement with said pin to permit the torsion of the spring 25 to throw said tumbler into the position shown in Fig. 4, and thus throw the blades 19 and 22 into open' position vtacts as just described, the 22, which is securely fixed to is released it and free from the respectivecontact clips 31 and 32, and 33 and Fig. 4.

At the instant of push-buttons is held pressed to its inward limit .of travel and thereby the finger 12 is momentarily held outward until the throw of the tumbler 21 has caused said finger to bring the stop catch 35 on said tumbler into engagement with said finger at its position shown in said Fig. 4, and such operation will limit the throw of the blades 19 and 22 to definite one-fourth revolution. In the meantime, the quarter revolution of the tumbler 21 will have carried the shifting pin 2S from its position .shown in Fig.

across to its position shown in Fig. with the push button 7 still -depressed to hold the sash 6, the gripping device 14 and the finger 12 pressedfinward, as previously described, such pin willthen rest adjacent the diagonally disposed face 37 on said gripping device. When the push-button will permit the spring 15 to force the sash 6 outwardly to its normal position and with it said button, movement carries the face ping device 14 into sliding engagement w1t the rigidly locked shifting pin 28 in such a. manner as to shift the said device from its position shown in Fig. 1 to its opposite' position, as shown in Fig. 5, which position-v is .that assumed by said device when the switch is at rest in its open position.

,34, as Shown in the opening of the conthe stop catch 36 thereon in. the position shown in Fig. 4 to recede from- 4 and4 and such 37 on the grip-.

VVh'ether the contact blades 19 and 22 are .Y

thrown to their open or closed positions, 1n-

either case they are securely positions by the finger 12 ward by the sash locked in such when carried out- 6 in a manner the push-button 7.

To insure the requisite amount/of tilt t'o the device 14 to bring the claw 27 on said device into proper and definite position with respect to the spring 25 and to render a positive engagement with and accurate operation of the same, the swing of the extremity 39 on said device is arrested by contact with the lug 40 on the bottom of the push button 7, as in Figs. 1 and 4, and to similarly provide a positively accurate engagement of the claw 26 with the spring` end 25, the swing ofthe extremity 41 on the said device is likewise arrested by contact with said lug, as in Fig. 5.

Assuming that the switch contacts are closed and that the contact clips 32 and 34 are connected with the source of supply, while 'the contacts 31 and 33 are meantime in connection with the appliances to be supplied, then a. current will iiow from supply clip 32, blade 19, and clip 31 to the applito enter, either of the slots 29 or 38 of the tumbler 21,'

blades mounted thereon,

' said guiding throw.

:3. A switch vof the class described, comprising a rocking shaftvhaving contact spiral springs on said shaft and connected to the same, a pushbutton mounted guiding member, a gripping member piv oted to said guidin member and adapted to engage with sai springs to rock said shaft and throw said blades, and means mounted onV said shaft for engagi with said gripping member to' release an limit the movement of said blades.

4. A switch of the class described, comprising a. rocking shaft having contact blades mounted thereon, spiral springs on said shaft and connected to the same, a pushbutton mounted on a spring controlled guiding member, a gripping member pivoted to member and adapted to engage with said springs to--rock said shaft and said blades, a trigger nger on said gripping member, and ymeans mounted on said shaft for engaging with said iin er to release and limit the movement o said blades.

A switch of the class described, comprising a rocking shaft having contact blades mounted thereon,

the same, a pushbutton mounted on a spring controlled guiding member, a gripping member pivoted to said guiding member and adapted to engage with said springs to rock said shaft and throw said blades, a trigger-finger on said gripping member, and a tumbler mounted on said shaft for engaging with saidnger to release and limit the movement of .said

throw, said blades,

blades.

6. A switch Iof the class described, comprising a rocking 'shaft having contact blades mounted thereon, spiral springs on said shaft and connected to the same, a pushbutton mounted on a spring controlled guiding member, agripping member pivoted to said guiding member and adapted to engage with said springs to rock said shaft and a trigger-linger on said gripping member, and a tumbler mounted on saidshaft and having slots therein for en-v l gaging with said iin er to' release and limit the movement of sai blades.

7. A switch of the class described, comprising a rocking, shaft having contact blades thereon, two opposite disposed spiral springs on said shaft and connected to the same, a push-button mounted on a spring controlled guiding member, a gripping member pivoted to said guiding member and adapted to engage with one of said springs to rock said shaft and throw said blades, means for releasing and limiting the movement of said blades, and means for shifting said grippingl member to engage the same with one of said springs.

8, A switch of the class described. comon a spring contro ledy spiral springs on said shaft and connected to on said shaft and message prising a rocking shaft having contact blades thereon, two opposite dispose spiral springs on said shaft and connected to the same, a lpush-button mounted on a spring controlled guiding rriember, a gripping member pivoted to said vguiding member and shaft and throw saidblades,- a tumbler for engagingwith said gripping member to releaseand limit the movement of said blades, and means on said tumbler -for shifting said gripping member to engage the same with one of said springs.

' 9. Al switch of the class described, comprising a rocking shaft having contact blades lengaging with said gripping member to release and limit the movement of said blades, and a pin onl said through said 'gripping member for shifting said member to engage the same with one of said springs.

10. A switch of the class described, comprising a rocking shaft having Contact blades thereon, two opposite disposed spiral springs on said shaft and connected to the same, a

push-button mounted on a spring controlled guiding member, a gripping .member pivoted to said guiding member'and adapted to engage with'one of said springs to rock said shaft and throw said blades, a tumbler mounted on said shaft for engaging with said gripping member to' release and limit the movement of said blades, and a pin on said tumbler and extending through said gripping member for shifting said member to engage the same with one of said springs.

11. A switch of the class described, comprising a rocking shaft having contact blades thereon, two opposite disposed spiral springs connected to the same, a push-button mounted on a spring controlled guiding member, a grippingmember pivoted to said guiding member and adapted to.

engage with one of said springs to rock said shaft and throw said blades, a trigger-finger on said gripping member, a tumblerfmounted on said shaft for engaging with said iinger to release and limit -the movement o said blades, and apin onsaid tumbler and extending through said gripping mer ber for shifting said member to engage with one of saidsprin'gs.

l2. A switch of theclass described, compri sing a rocking shaft having contact blades thereon, two opposite disposed spiral springs on said shaft and push-button mounted on a spring controlled guiding member, a gripping member pivoted adapted tof engage with one of said springs to rock said tumbler and extending iio the same connected to the same, a

to said guiding member and adapted toengage with one of said springs to rock said shaft and throw said blades, a trigger-finger on said gripping member, a tumbler mounted on said shaft and having slots therein for en aging with said finger to release and limit t efmovement of said blades, and a pin on said tumbler and extending through said gripping member for shifting said member to engage the same with one of said springs. 13. A. switch of the class described, comprising a rocking shaft having contact blades thereon, spiral springs on said shaft and connected thereto, a push-button mounted on a guiding member, a gripping member pivoted to said guiding member and adapted to engage with said and throw said blades, means for releasin and limiting the movement of said blades, and spring means for returning said guiding member to its normal position when the button isreleased. 14. A switch of the class described, comprising a rocking shaft having Contact blades thereon, spiral springs on Vstaid shaft and, connected thereto, a push-button mounted on springs to rock said shaft a guiding member, oted to said guiding member and adapted to age with said springs to rock said shaft throw said blades, a trigger-nger on said gripping member, means for engaging with said finger to release and limit the movement of said blades, and springmeans for engaging with said ingerto return said vguiding member to its normal position when the button is release 15. In a switch, the combination'vof oscillating switch mechanism having projections, a reciprocating rocking gripping fm mber having two arms each provided with ahook, one for eachl of said projections, said hooks being turned toward each other, said hooks engaging with their 4 corresponding rojections alternately, said projections being 1o` cated between said hooked arms and means for reciprocating said ipping member.

In testimony Whereoi, I the said ADELBERT W. GRAY have hereuntoset my hand.

j ADELBERT W. GRAY.

Witnesses:

J. N. Coene, T. B. HuMPHRms.

a gripping member piv- 

